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Patented July 13, 1886.

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DIFFERENTIAL AGGUMULATOR.

No. 345,360. Patenteduly 1s, 1886.

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(No Model.) 3 Sheets-Sheet 3. E. BOEHME.

DIFFERENTIAL AGGUMULATOR. No. 345,360. Patented July 13, 1886.

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NTTn STATES EMIL BOEHME, OF BRESLAU, PRUSSIA, GERMANY.

DIFFERENTIAL ACCUMULATOR..

SPECIFICATION forming part of Letters Patent No. 345,360, dated July 13, 1886.

Application filed April 8, 1886. Serial No.198,307. (No model.)

To cZZZ whom, it may concern:

Be it known that I, EMIL BOEHME, a subject of the King of Prussia, residing at Breslau, in the Kingdom of Prussia, Germany,have invented new and useful Improvements in Differential Accumulators, of which the following is a specification.

- This invention relates to an apparatus by means of which it will be possible toimultiply and to increase an existing hydrostatical pressure.

The invention consists in the elements of improvement hereinafter more fully pointed out.

In the accompanying drawings, Figure l is a vertical section, Fig. 2 a side View, and Fig. 3 a plan, of the machine.

The apparatus consists of a large hydraulic piston, a,which is fastened invariably and vertically to a bed-plate by means of a foot, u. The piston a has in its longitudinal direction a cylindrical hollow space, b, which serves as a hydraulic cylinder for the second small piston, c. This latter piston issecured in the top of the large hydraulic cylinder (Z in such a manner that their two axes will coincide. The cylinder cZ is provided at its lower part with a flange, e, supporting the rings f. The weight of the rings j" is so calculated that the hydrostatical pressure will just be sufficiently strong to lift the cylinder Z together with these ringsf. To obtain a sure straight motion the cylinder Z is guided by the guides 7L h, fixed on the pillars t' The large piston a is provided with a passage, k, extending from one end nearly to the'e other and communicating with the pipe Z. The piston c is also provided with a suction-valve, m, to which the pipe o is attached7 and with a delivery-valve, a, connected with the pipe p. The pipe Z communicates by the knee q with the reversingvalve r, and consequently alternately with the two outlets s and t, Fig. 3. Wheirthe cylinder d moves up and down, the valve r is moved to and fro by means of the rod o, provided withztwo Stoppers, e n2, one or both of which may be'made adjustable. The rod o is connected to the lever w, `carrying the jointing pieces x, attached to the link z, fast to the end of the valve-rod r. To the link e the le ver y is attached, provided with a Weight, g. This lever y is for the purpose of assuring a sure and tight closure of the valve on each side.

In the working of the apparatus, the water, being under pressure, enters through the pipe s, the valve r, and through the knee q, pipe Z, and passage 7c into the cylinder cZ, and lifts the same, while at the same time the piston b sucks water up out of a suitable vessel by means of the valve m and the pipe o. If the cylinder cZhas arrived at its highest position the valve r is moved to the leit, (position shown in thc drawings,) the inlet s is closed, and the outlet t opened. The water flows thus freely out of the cylinder d, and the latter acts with its own weight and with that of the rings f on the piston c, and consequently also on the liquid inclosed in the cylinder b. The suctionvalve m is closed while the delivery-valve a is opened,when the water, being now under a Very. strong pressure, is allowed to escape for the purpose of effectuating work. The ratio of this pressure to the original hydrostatic pressure is the same as that of the cross-section or area of the piston a to the cross-section or area of the piston c. Then the cylinder has arrived at the bottom, the valve r is moved to the opposite side, the outlet t and the delivery-valve a are closed, while the inlet s is opened,and the operation begins anew.

.For a continuous utilization of the multiplied hydrostatical pressure it will be necessary to mount at least two differential accu'mulators, and to combined the same so that they may work alternately.

l claim as my invention- The combination, in a differential accumulator, of piston a, provided with the channel k, and having cylindrical hollow space b, and the valves m and n, with cylinder d, piston c, ring f, valve r, rod c, mechanism w .fr y z, and the weight g, substantially as described.

In testimony whereof I havesigned my name to this specification in the presence of two sub- EMIL BOEHME.

scribing witnesses.

"Witnesses:

PAUL KRAUsE, EDUARD KLEINERT. 

